Ball for tube-welding mandrels



(No Model.)

W. S. MOMANUS.

BALL FOR TUBE WELDING MANDRELS. I No. 398,638. PaJtented Feb. 26, 1889.

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Mrs STATES PATENT OFFICE.

WILLIAM S. )ICIllANUS, OF CHESTER, PENNSYLVANIA.

BALL FOR TUBE-WELDING MANDRELS.

SFECIFICATION forming part of Letters Patent No. 398,638, dated February26, 1889.

Application filed December 10, 1888. $erial No. 293,151. (No model.)

To all whom it 71211 7 concern Be it known that I, ILLIAM S. MOMANUS, acitizen of the United States, residing in Chester, in the county ofDelaware and State v of Pennsylvania, have inventeda new and 1 usefulImprovement in Balls or Mandrels for the lllanufacture of Pipes, Tubes,&c., which improvement is fully set forth in the following specificationand accompanying drawings.

The object of my invention is the construction of a ball or mandrelemployed in the manufacture of metal tubes and pipes, the} same beingformed of an integral body renj dered elastic, whereby the tubes orpipes are i the shell elastic, so that it is caused to yield whensubjected to pressure.

The ball may be formed with the slot or slots in the process of castingthe same, or said slot or slots may be produced after the castingoperation by a suitable cutting tool, implement, or machine.

In the operation of making a tube or pipe the same passes over the ball,as usual. Should said tube or pipe stick on the ball, or vice versa,while passing through the rolls, the pressure on the ball will cause thelatter to spring inwardly or yield sufficiently to reduce the strain onthe contiguous parts of the tube or pipe and ball, and thus allow thepipe to pass over the ball, as is evident.

I am aware that it is not new to make a ball or mandrel of separatedparts connected Fi s. 2 and :i'. represent end views thereof, re-

spectively. Fig. represents a section, on a reduced scale, of a pipe anda ball or man- 1 drel in operative position therein as embody- .i ng myinvention. Fig. 0 represents a longisponding parts in the severalfigures.

Referring to the drawings, A designates a a ball or mandrel for themanufacture of wrought-metal tubes and pipes, the same being of the formof a hollow shell, having a connecting core or neck, B, integraltherewith, with an opening to receive the rod, which parts, exceptingthe feature of my invention applied thereto, are of well-knownconstruction.

In the wall of the shell, Figs. 1 and 2, at opposite places, arelongitudinally-extending slots C, which extend to the neck I3, and inFigs. 3 and 4 a single slot is shown, the same extending through theshell and core to the opening of the latter. In either case thecontinuity of the circumference of the shell is broken,while the coreremains connected With the shell, it being seen that the slots render bybolts or screws and springs; and I disclaim the same. By my constructionI dispense with said bolts and sprin s and produce a stronger and moreserviceable article, and have therefore made an improvement in the art,it being evident that I do not limit myself to the location and numberof the slots or grooves O,

1 nor to the length or depth thereof.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A ball for the purpose set forth, formed of an integral hollow bodyhaving the continuity of its peripheral wall broken by alongit-udinally-extending slot or slots, substantially as described.

2. A ball for the purpose set forth, consisting of an integral hollowbody with an interior neck and slot or slots breaking the peripheralcontinuityof said integral body, substantially as described.

WILLIAM MoMANUS.

Witnesses:

A. P. JENNINGS, JAMES F. KELLY.

